In the mixed phase, the circulating current causes the motion of the vortices. This motion causes the flux-flow resistivity which broadens the superconducting transition. The resistivity, caused by the dissipation, originates from the normal core current in the vortex and the supercurrent around it [1]}. The vortex motion creates a disturbance to the supercurrent around the vortex, which results the creation of an electric field distribution [2]}. To have the continuity of the electric field, a normal current circulates within the core of the vortex. This normal core current creates the first dissipation. The electric field, which is perpendicular to both vortex direction and the vortex velocity, is created due to the motion of the vortices in a magnetic field [3]}, [4]}. The second source of dissipation is created by this electric field outside the vortex core [5]}. It has been shown that both of these dissipation have a similar order of magnitude [5]}, [2]}.
